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How many GPIO pins does the ESP32 have?
The ESP32 chip comes with 48 pins with multiple functions. Not all pins are exposed in all ESP32 development boards, and some pins cannot be used. There are many questions on how to use the ESP32 GPIOs.
How many GPIO pins are there?
Raspberry Pi models Most models of the Raspberry Pi have a 40-pin header, as shown in the image above. Of the 40 pins, 26 are GPIO pins and the others are power or ground pins (plus two ID EEPROM pins, which you should not play with unless you know your stuff!).
How many GPIO pins are there in ESP32 Devkit?
ESP32 Devkit supports thirty GPIO pins and but not all the pins can be used as digital output pins. From a total of 30 pins, only 24 pins can be used both as digital input and output. But six pins like GPIO34, GPIO35, GPIO36, GPIO37, GPIO38, GPIO39 can be used as digital input pins only.
What are pins 16 and 17 of the ESP32 used for?
Pins 16 and 17 are reserved for writing to internal flash memory. The ESP32’s GPIO is designed to send logic signals. The GPIO will be able to deliver enough power to power a few LEDs, on the other hand, the GPIO of the ESP32 cannot be used to power equipment that requires more energy such as a motor.
What’s the difference between gpio21 and gpio22?
You can attach the PWM signals to the GPIO pins to get output. It has dedicated pins available for two-wire I2C communication. One pin is used for data transfer and another pin is used for clock synchronization. GPIO21 is SDA pin. GPIO22 is SCL pin.
Which is the enable pin for ESP32 flash memory?
GPIO 6 to GPIO 11 (connected to the ESP32 integrated SPI flash memory – not recommended to use). Enable (EN) is the 3.3V regulator’s enable pin. It’s pulled up, so connect to ground to disable the 3.3V regulator. This means that you can use this pin connected to a pushbutton to restart your ESP32, for example.